Dave Buckley Posted October 2, 2008 Share Posted October 2, 2008 Just practising my night time lighting on interiors with mental ray. I think this is starting to look ok, what do you think??? Light levels ok??? scene is from charrette over at vizdepot Link to comment Share on other sites More sharing options...
mattclinch Posted October 2, 2008 Share Posted October 2, 2008 1589835-nice.ies looks ok. little underexposed so difficult to tell really. Link to comment Share on other sites More sharing options...
Dave Buckley Posted October 2, 2008 Author Share Posted October 2, 2008 somebody knows there IES files haha, it is a commonly used one i know but i'm just practising Underexposed??? I shall make a few ammendments. But if you went downstairs in the middle of the night and flicked the kitchen light on, you really think it would illuminate more than that?? Link to comment Share on other sites More sharing options...
mattclinch Posted October 2, 2008 Share Posted October 2, 2008 depends what your aiming for.. a moody dim eye view, or how a correctly exposed camera would see it. Link to comment Share on other sites More sharing options...
Dave Buckley Posted October 2, 2008 Author Share Posted October 2, 2008 i guess it kinda looks like a film noir style although that is not what i was aiming for, will try and do one properly exposed, just rendering out a daylight version with camera in same position to do a comparison. i've been learning vray recently so thought i better keep dabbling with mental ray so i don't lose what i have learnt already. also trying to incorporate GI with my FG as i only ever used to use FG for interiors. when this daylight one is finished, i'm going to have another crack at the night one, its weird tho because i am using fg and GI i end up having to use unrealistic exposure values otherwise it is far too bright. in the night scene i had it exposed on the night time default and it looked good, then i turned on gi and now the EV value is set to 11, weird Link to comment Share on other sites More sharing options...
Ingsoc75 Posted October 2, 2008 Share Posted October 2, 2008 I'm curious as to how you set your scene up. Could you post a wireframe screenshot or post some settings? Link to comment Share on other sites More sharing options...
Lazarus Posted October 2, 2008 Share Posted October 2, 2008 It's a bit dark and the lamps are emmiting very "cold" light.Maybe it'll be better to use a halogen light preset?And the halogen lamps need to be self illuminated cause there turned on. Link to comment Share on other sites More sharing options...
Gander0 Posted October 3, 2008 Share Posted October 3, 2008 If your just practicing I recommend you get some interior reference photography from google and try to match the lighting. Those downlights are usually super bright Link to comment Share on other sites More sharing options...
Dave Buckley Posted October 3, 2008 Author Share Posted October 3, 2008 cheers or the comments guys, just re-working the night shot then will post a render. As far as settings go in that render, then its just photometric lights FG on medum preset, with 1 bounce GI enabled, with 200000 average GI photons per light ad also optimized for final gather enabled. Mr photographic exposure control is on with an EV = 11 (which i know is unrealistic, it should be more like EV=2 which it is with just FG, but when i enable GI i have to change it around 11 otherwise everything is superbright, any ideas why guys??) everything else is pretty much default apart from a few changes made to sampling and spatial contrast and filters. Link to comment Share on other sites More sharing options...
mattclinch Posted October 3, 2008 Share Posted October 3, 2008 FG bounces will not have any effect if you are using GI. put your EV value to something more realistic and adjust the intensity of your lights to suit. what colour are your walls? Link to comment Share on other sites More sharing options...
Dave Buckley Posted October 3, 2008 Author Share Posted October 3, 2008 ok but when using photometric web files, i thought that intensity was already correct, i was under the impression that this didn't need to be changed everything has default white material on it at the mo. i tend to do lighting then materials Link to comment Share on other sites More sharing options...
Dave Buckley Posted October 3, 2008 Author Share Posted October 3, 2008 i think i found my problem, when i first brought in the web file, it had a resulting intensity of around 8500cd, i now have my EV value set at 3.5, so what would a good cd intensity be now for this, at the minute it is at around 60 which is looking ok but would this be about right ? Link to comment Share on other sites More sharing options...
Dave Buckley Posted October 3, 2008 Author Share Posted October 3, 2008 heres the reworked one, actual bulbs now turned on, exposure is more realistic and have got rid of the ever appearing nice.ies what do you think?? this is also now just FG with 1 bounce, incorporating GI appears to make the lighting solution appear flatter Link to comment Share on other sites More sharing options...
Ingsoc75 Posted October 3, 2008 Share Posted October 3, 2008 It looks nice to me. daveb867 could you be so kind as to tell me what kind of lights you are using and other details than what you have already posted? I ask because I have not found a MR tutorial or example scene showing how to set up an interior with no external light like a basement or night time room like this one. Link to comment Share on other sites More sharing options...
Gander0 Posted October 3, 2008 Share Posted October 3, 2008 Yeah thats looking really nice now! Link to comment Share on other sites More sharing options...
Dave Buckley Posted October 4, 2008 Author Share Posted October 4, 2008 cheers guys, when i finish texturing it up i will post screenshots with all settings. it should be good, because i am just rendering a view from upstairs with blue led's in the roof and they have come out quite well. will keep you updated guys, and i will share my settings once it is complete and they are final Link to comment Share on other sites More sharing options...
Dave Buckley Posted October 6, 2008 Author Share Posted October 6, 2008 just another quick update, not getting much time to work on this but i just wanted to get rid of my one diffuse bounce because the more i look at the update before this one, the more i think its a little bit to bright, and the light in the scene is travelling a little bit to far. just thrown in some furniture to liven it up a bit, oh and i've begun decorating, only painted the walls so far Link to comment Share on other sites More sharing options...
Dave Buckley Posted October 6, 2008 Author Share Posted October 6, 2008 oops let me know which you prefer Link to comment Share on other sites More sharing options...
Justin Hunt Posted October 6, 2008 Share Posted October 6, 2008 the lighting is good, a bit too yellow, try white balance it a bit more. Also get rid of the sharp shadows they are killing the scene. Try area lights jhv Link to comment Share on other sites More sharing options...
SandmanNinja Posted October 7, 2008 Share Posted October 7, 2008 Here's some tips on Web Distribution Files: a D65 light is almost pure white a D50 is a warmer light, very much like a standard incandestic bulb Too dark? Increase the candles of the light Using mrPhotographic settings on the Environment panel, play with the shutter speed and ISO film speed Link to comment Share on other sites More sharing options...
mattclinch Posted October 7, 2008 Share Posted October 7, 2008 i think i found my problem, when i first brought in the web file, it had a resulting intensity of around 8500cd, i now have my EV value set at 3.5, so what would a good cd intensity be now for this, at the minute it is at around 60 which is looking ok but would this be about right ? setup your scene physically. GI will help this scene no end. don't trust the candela value of your IES file when it comes in to max - A common candle emits roughly 1 cd. A 100 W incandescent lightbulb emits about 120 cd. Link to comment Share on other sites More sharing options...
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